/*
 * Copyright (C) 2008 Universidade Federal de Campina Grande
 *  
 * This file is part of OurGrid. 
 *
 * OurGrid is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free 
 * Software Foundation, either version 3 of the License, or (at your option) 
 * any later version. 
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT 
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * for more details. 
 * 
 * You should have received a copy of the GNU Lesser General Public License 
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package org.ourgrid.worker.controller;

import java.util.concurrent.Future;

import org.ourgrid.common.interfaces.management.WorkerManagementClient;
import org.ourgrid.common.interfaces.to.WorkerStatus;
import org.ourgrid.reqtrace.Req;
import org.ourgrid.worker.WorkerConfiguration;
import org.ourgrid.worker.dao.WorkAccountingDAO;
import org.ourgrid.worker.dao.WorkerStatusDAO;
import org.ourgrid.worker.messages.WorkerManagementClientFailureControllerMessages;

import br.edu.ufcg.lsd.commune.api.FailureNotification;
import br.edu.ufcg.lsd.commune.api.InvokeOnDeploy;
import br.edu.ufcg.lsd.commune.api.RecoveryNotification;
import br.edu.ufcg.lsd.commune.container.servicemanager.ServiceManager;
import br.edu.ufcg.lsd.commune.identification.DeploymentID;

/**
 * Implement Worker actions when the manager Peer fails.
 */
public class WorkerManagementClientFailureController  {

	private ServiceManager serviceManager;

	@Req("REQ079")
	@InvokeOnDeploy
	public void init(ServiceManager serviceManager) {
		this.serviceManager = serviceManager;
	}
	
	/**
	 * @return the serviceManager
	 */
	protected ServiceManager getServiceManager() {
		return serviceManager;
	}

	@Req("REQ122")
	@FailureNotification
	public void doNotifyFailure(WorkerManagementClient monitorable, DeploymentID monitorableID) {
		
		if (!getMasterPeerPubKey().equals(monitorableID.getPublicKey())) {
			getServiceManager().getLog().warn(
					WorkerManagementClientFailureControllerMessages.getUnknownPeerFailsMessage(monitorableID));
			return;
		}
		
		if (getWorkerStatusDAO().getMasterPeer() == null) {
			getServiceManager().getLog().warn(
					WorkerManagementClientFailureControllerMessages.getUndefinedMasterPeerFailsMessage(monitorableID));
			return;
		}
		
		if (getWorkerStatusDAO().isAllocated()) {
			WorkerController.getInstance().interruptWorking(getServiceManager(), true);
		}
		
		getServiceManager().getLog().warn(
				WorkerManagementClientFailureControllerMessages.getMasterPeerFailsMessage(monitorableID));
		
		getWorkerStatusDAO().masterPeerFails();
		getWorkerStatusDAO().setStatus(WorkerStatus.IDLE);
		
		Future<?> reportAccountingActionFuture = getWorkAccountingDAO().getReportAccountingActionFuture();
		if (reportAccountingActionFuture != null) {
			reportAccountingActionFuture.cancel(true);
		}
		
		getWorkAccountingDAO().resetAccountings();
		
		getServiceManager().release(monitorable);
	}
	
	@RecoveryNotification
	public void doNotifyRecovery(WorkerManagementClient monitorable) {
		
	}
	
	private WorkerStatusDAO getWorkerStatusDAO() {
		return getServiceManager().getDAO(WorkerStatusDAO.class);
	}
	private WorkAccountingDAO getWorkAccountingDAO() {
		return getServiceManager().getDAO(WorkAccountingDAO.class);
	}
	
	private String getMasterPeerPubKey() {
		return getServiceManager().getContainerContext().getProperty(WorkerConfiguration.PROP_PEER_PUBLIC_KEY);
	}

}